netdev - [net 11/16] net/mlx5e: Fix memory leak on updating vport counters

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Date:   Mon,  9 Jan 2023 22:11:18 -0800
From:   Saeed Mahameed <saeed@...nel.org>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Eric Dumazet <edumazet@...gle.com>
Cc:     Saeed Mahameed <saeedm@...dia.com>, netdev@...r.kernel.org,
        Tariq Toukan <tariqt@...dia.com>, Aya Levin <ayal@...dia.com>,
        Maor Dickman <maord@...dia.com>
Subject: [net 11/16] net/mlx5e: Fix memory leak on updating vport counters

From: Aya Levin <ayal@...dia.com>

When updating statistics driver queries the vport's counters. On fail,
add error path releasing the allocated buffer avoiding memory leak.

Fixes: 64b68e369649 ("net/mlx5: Refactor and expand rep vport stat group")
Signed-off-by: Aya Levin <ayal@...dia.com>
Reviewed-by: Maor Dickman <maord@...dia.com>
Signed-off-by: Saeed Mahameed <saeedm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_rep.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index 75b9e1528fd2..7d90e5b72854 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
@@ -191,7 +191,7 @@ static MLX5E_DECLARE_STATS_GRP_OP_UPDATE_STATS(vport_rep)
 	if (err) {
 		netdev_warn(priv->netdev, "vport %d error %d reading stats\n",
 			    rep->vport, err);
-		return;
+		goto out;
 	}
 
 	#define MLX5_GET_CTR(p, x) \
@@ -241,6 +241,7 @@ static MLX5E_DECLARE_STATS_GRP_OP_UPDATE_STATS(vport_rep)
 	rep_stats->tx_vport_rdma_multicast_bytes =
 		MLX5_GET_CTR(out, received_ib_multicast.octets);
 
+out:
 	kvfree(out);
 }
 
-- 
2.39.0